I have got a ESRI file geodatabase(10.3) with many feature-classes(Polygon, Polyline & point). I don't have enterprise ESRI license. I have to split the entire data into two unique parts to do simultaneous edit/update by two employees.
I'm assuming you are trying to do this split spatially so one employee can work on a half while the other employee works on the other half. I would use model builder. Define the two areas you want to split the database into with polygons. Use each polygon to clip each feature class in the database and set the export to a new database. Do that for each half.